（）需购买增值网服务才能实现。
A、EDI商务
B、互联网服务
C、intranet商务
D、Extranet商务
参考答案：A
For a moment nothing happened. Then ______all shouting together.
A．voices had came
B．did voices come
C．came voices
D．voices would come
转变政府职能的关键是( )。
A．处理好计划与市场的关系B．处理好价格与价值的关系C．中央与地方分权D．政企职能分开
